<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>JTool</title>
    <script src='js/jquery-1.11.3.min.js'></script>
    <script src='js/popup.js'></script>
    <style>
        body {
            width: 170px;
        }
        
        button {
            background: #ffffff;
            border: none;
        }
    </style>
</head>

<body>
    <div>
        <button type="button" id='open'></button>
    </div>


</body>

</html>